Cramps and bleeding 5+ weeks

Hi everyone, found out I'm pregnant recently but have been having cramps for 3 days and spotting for 8 days I have got a daughter she's 6 but can't ever remember this happening in my first pregnancy, I did speak to professionals and they shrugged me off saying I'm fine but I don't think implantation cramps and bleeding is meant to go on this long..... Was just wondering if anyone has had this and still had a successful pregnancy I have had trouble carrying since my daughter so am worry and the spotting is everytime I go to toilet but its like a brown dye any advise would be appreciated thank you x